Site 1A is a muddy bottom stream as defined by the Adopt-A-Stream criteria for "Determining Stream Type." North Georgia streams are typically rocky bottom streams, and South Georgia streams are typically muddy bottom streams; however, where residential developments are found, the streams often change in type due to the addition of topsoil, plantings, and subsequent runoff that deposits fine silt into the stream bed. Such is the case in Site 1A, where there is evidence of the residential effects on the stream, with considerable deposits of fine silt and organic matter. The Site 1A muddy bottom stream type is represented in Long Island Creek by grass and English ivy (vegetated margins), tree roots, leaves, and branches (woody debris with organic matter), and a substrate of mud.
In-Stream Characteristics
Using the Georgia Adopt-A-Stream Visual Survey Form, the in-stream characteristics start with defining the stream reach. The bankfull width in this case is 3.5 feet multiplied by 12, for a stream reach of 42 feet. On 19 June 2012, when the visual survey was conducted, the weather was noted as having had rain within the previous 24 hours. One pool was identified with no flowing water (see the picture below). The stream reach was almost completely embedded with mud. In fact, the third picture of this page shows the culvert partially filled with mud. As mentioned before, the presence of leaves, twigs, and root mats are plentiful. As for water clarity on the day of the visual survey, no staining or suspended matter was observed, but leaves and silt had settled to the bottom of the pool. The water had no odor, but there was a naturally oily sheen to the surface.
12 June 2012 Long Island Creek site 1A Group 1 checks stream velocity with a ping pong ball.
12 June 2012
At the first visit, the stream was a pool of murky water due to a rain event the previous day that caused erosion and runoff from the adjacent watershed area. The stream was not flowing and therefore had zero velocity.
Bank Erosion
The remediation for erosion control includes a wooden retaining wall on the downstream right bank, and riprap (granite stones) and English ivy on the downstream left bank. These measures indicate that during heavy rain events, the water rises rapidly and to a much higher level than during normal rain events. The restoration in the floodplain is somewhat successful in controlling erosion and halting the deepening of the stream channel. The plants with their root networks have reduced the erosion on both banks.
19 June 2012 Michael Johnson and Mike Vest measure and record the stream profile.
19 June 2012
At the second visit, the pool of water was much smaller due to evaporation and no additional rain. The weather conditions were dry and hot, with record high temperatures. There was no flow and no velocity. The murky water noticed at the previous visit was now clearer because the suspended particles had settled and deposited to the streambed.
26 June 2012
At the third visit, the pool of water had totally evaporated and/or percolated underground, depositing the fine silt to the streambed. Please note that the silt deposits in the culvert that have filled approximately 1/3 the pipe's diameter. The current weather patterns of dry, hot weather conditions continued, contributing to the water loss. Site 1A is open and exposed to sunlight and wind, which further promotes evaporation.
Physical Measurements
Date
Bankfull width
in feet
Water width
in feet
Height 1
Height 2
Height 3
Height 4
Height 5
Height 6
Height 7
Height 8
Height9
Height 10
19 June 2012
17
5.5
0
3.00
3.20
3.60
4.25
4.50
4.42
4.33
3.33
0
Stream Profile
Discharge
Date
Average
Depth in decimal feet
Average
Width in decimal feet
Area in decimal sqft
Average Time
in seconds
Length
in feet
Speed ft/sec
Coefficient
Stream Flow
in cubic feet/sec
June 12, 2012
0.533
3.5
1.943667
0
18
0
.8
0
June 19, 2012
0.21
2.5
0.525
0
18
0
.8
0
June 26, 2012
0
0
0
0
0
0
.8
0
As site 1A had no water movement, it therefore had no speed or discharge.
Long Island Creek site 1A - Stream
Overview
Site 1A is a muddy bottom stream as defined by the Adopt-A-Stream criteria for "Determining Stream Type." North Georgia streams are typically rocky bottom streams, and South Georgia streams are typically muddy bottom streams; however, where residential developments are found, the streams often change in type due to the addition of topsoil, plantings, and subsequent runoff that deposits fine silt into the stream bed. Such is the case in Site 1A, where there is evidence of the residential effects on the stream, with considerable deposits of fine silt and organic matter. The Site 1A muddy bottom stream type is represented in Long Island Creek by grass and English ivy (vegetated margins), tree roots, leaves, and branches (woody debris with organic matter), and a substrate of mud.In-Stream Characteristics
Using the Georgia Adopt-A-Stream Visual Survey Form, the in-stream characteristics start with defining the stream reach. The bankfull width in this case is 3.5 feet multiplied by 12, for a stream reach of 42 feet. On 19 June 2012, when the visual survey was conducted, the weather was noted as having had rain within the previous 24 hours. One pool was identified with no flowing water (see the picture below). The stream reach was almost completely embedded with mud. In fact, the third picture of this page shows the culvert partially filled with mud. As mentioned before, the presence of leaves, twigs, and root mats are plentiful. As for water clarity on the day of the visual survey, no staining or suspended matter was observed, but leaves and silt had settled to the bottom of the pool. The water had no odor, but there was a naturally oily sheen to the surface.12 June 2012
At the first visit, the stream was a pool of murky water due to a rain event the previous day that caused erosion and runoff from the adjacent watershed area. The stream was not flowing and therefore had zero velocity.Bank Erosion
The remediation for erosion control includes a wooden retaining wall on the downstream right bank, and riprap (granite stones) and English ivy on the downstream left bank. These measures indicate that during heavy rain events, the water rises rapidly and to a much higher level than during normal rain events. The restoration in the floodplain is somewhat successful in controlling erosion and halting the deepening of the stream channel. The plants with their root networks have reduced the erosion on both banks.19 June 2012
At the second visit, the pool of water was much smaller due to evaporation and no additional rain. The weather conditions were dry and hot, with record high temperatures. There was no flow and no velocity. The murky water noticed at the previous visit was now clearer because the suspended particles had settled and deposited to the streambed.26 June 2012
At the third visit, the pool of water had totally evaporated and/or percolated underground, depositing the fine silt to the streambed. Please note that the silt deposits in the culvert that have filled approximately 1/3 the pipe's diameter. The current weather patterns of dry, hot weather conditions continued, contributing to the water loss. Site 1A is open and exposed to sunlight and wind, which further promotes evaporation.Physical Measurements
in feet
in feet
Stream Profile
Discharge
Depth in decimal feet
Width in decimal feet
in decimal sqft
in seconds
in feet
ft/sec
in cubic feet/sec
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